Respuesta :

YoonKim2009

Answer:

11x²-9xy-y²-3y

Step-By-Step Explanation:

1. (7x²-4xy-y²) - (4x²+5xy+3y)

2. (7x²-4x²-4xy-5xy-y²-3y)

3. (11x²-9xy-y²-3y)

Answer

11x²-9xy-y²-3y

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